Sigma Force

Sigma Force is an elite covert arm of the US Defense Department made up of former Special Forces officers trained as experts in various scientific fields.

Sigma Force consists of seventeen primary books, and includes five additional books that complement the series but are not considered mandatory reads, and the series is set to expand with the upcoming release of two more books. The current recommended reading order for the series is provided below.

Updated January 6, 2023




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  ⧗ 9.00 / 1
  ⧗ 8.00 / 1
  ⧗ 9.34 / 3
  ⧗ 8.00 / 1
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Speculative Fiction Books

(Sigma Force #1 / 19)
2004 | science fiction, thriller, adventure
(Sigma Force #2 / 19)
2005 | science fiction, thriller, adventure
(Sigma Force #3 / 19)
2006 | science fiction, thriller, adventure
(Sigma Force #4 / 19)
2007 | science fiction, thriller, adventure
(Sigma Force #5 / 19)
2008 | science fiction, thriller, adventure
(Sigma Force #6 / 19)
2009 | science fiction, thriller, adventure
(Sigma Force #7 / 19)
2010 | science fiction, thriller, adventure
(Sigma Force #8 / 19)
2012 | science fiction, thriller, adventure
(Sigma Force #9 / 19)
2013 | science fiction, thriller, adventure
(Sigma Force #10 / 19)
2014 | science fiction, thriller, adventure
(Sigma Force #11 / 19)
2015 | science fiction, thriller, adventure
(Sigma Force #12 / 19)
2016 | science fiction, thriller, adventure
(Sigma Force #13 / 19)
2017 | science fiction, thriller, adventure
(Sigma Force #14 / 19)
2019 | science fiction, thriller, adventure
(Sigma Force #15 / 19)
2020 | science fiction, thriller, adventure
(Sigma Force #16 / 19)
2021 | science fiction, thriller, adventure
(Sigma Force #17 / 19)
2023 | science fiction, thriller, adventure
(Sigma Force #18 / 19)
2024 | science fiction, thriller, adventure | Release date August 6, 2024
(Sigma Force #19 / 19)
2024 | science fiction, thriller, adventure | Release date 2024
(Sigma Force)
2011 | science fiction, thriller, adventure
(Sigma Force)
2012 | science fiction, thriller, adventure
(Sigma Force)
2015 | science fiction, thriller, adventure
(Sigma Force)
2016 | science fiction, thriller, adventure
(Sigma Force)
2017 | science fiction, thriller, adventure